Pipe sighting device and contour marker



April 28, 1953 J. H. MORRIS 2,636,273

PIPE SIGHTING DEVICE AND CONTOUR MARKER Filed April 12. 1951 2 SI-IEETSSl-IE'ET 1 arm w:

JA/I/A/Z/I/M/rm 4rram z April 28, 1953 J. H. MORRIS 2,636,273

PIPE SIGHTING DEVICE AND CONTOUR MARKER Filed April 12, 1951 2SHEETS-SHEET 2 Patented Apr. 28, v 1953 OFFICE PIPE SIGHTING DEVICE ANDCONTOUR MARKER James H. Morris, Long Beach, Calif.

Application April 12, 1951, Serial No. 220,625

2 Claims. 1

mounted on a section of pipe and which carries a sighting tube somounted that the appropriate horizontal and vertical angles ofmisalignment can be quickly and easily determined.

Another object of my invention is to provide a novel pipe sightingdevice of the character stated, in which rotatable protractor-s are somounted that both the horizontal and vertical angles, or either of them,can be determined.

A feature of my invention is to provide a pipe sighting device of thecharacter stated, in which the amount and direction of misalignment oftwo pipes can be accurately determined, and also the shape of the cut onthese pipes can be accurately and quickly determined by the operator ofthe device.

Another feature of my invention is to provide a device of the characterstated, which is simple in construction and which can be easily operatedby the user.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subioined detailed description and theappended claims."

In the drawing:

Figure 1 is a perspective view of my pipe sighting device in position onmisaligned pipe.

Figure 2 is a perspective view of the tool with the sighting tuberemoved.

Figure 3 is an enlarged framentary side elevation of my pipe sightingdevice with parts broken away to show interior construction.

Figure 4 is a perspective view of the pipe sighting device showing themarker in position.

Figure 5 is a sectional view taken on line 5-5 of Figure 3.

Figure 6 is a perspective view of the protractor showing the sightingtube arranged to determine the horizontal angle.

Figure '7 is a perspective view of a modified form of pipe sightingdevice.

Figure 8 is a fragmentary plan view of the hinged connecting tube of thepipe sighting device.

Figure 9 is a fragmentary side elevation of the same.

Referring more particularly to the drawing, the numeral I indicates mysighting device, which consists of a pair of spaced V-blocks 2 and 3,which are connected by a tube 4, which is fixedly attached to bothV-blocks. The V- blocks are so constructed that they will fit on to thetop of the pipe to be worked upon, substantially as shown in Figure 1,and will center themselves on the pipe due to the shape of the block.

In certain instances, it may be desirable to attach the sighting deviceto a structural shape, and for that purpose I provide a hook 5 in theblock 2, and a hook 6 in the block 3. These hooks are slidably mountedin the V-blocks and are held in adjusted position relative to the blocksby a set screw 1.

The sightingconstruction consists of a bifurcated head 8, from which atrunnion 9 extends. This trunnion is fixedly secured to the head 8 andfits closely within the tube 4. A set screw I0 is threaded into the tube4 and bears against the trunnion 9, thus holding the trunnion and thehead 8 against movement when the set screw I0 bears against thistrunnion.

A protractor II is fixedly attached to the head 8 and this protractorbears against the outer face of the V-block 2. The purpose of thisprotractor will be further described.

A second protractor I2 is pivotally mounted in the head 8 on the pin I3.This pin is removable so that the protractor I2 can be removed, as willbe further described. The calibrations on the protractor I2 are readthrough a window I4 in the head 8. It will be evident that the head 8can be rotated in the tube 4 so that the protractor I2 may be either ina horizontal or a vertical position. This will be subsequently describedin the operation of the device.

In the outer face of the protractor I2, I provide a threaded hole I5which receives a bolt I6 to hold the marking arm IT. This marking armcarries a chalk I8 at its outer end for the purpose of marking the pipeI9 or 20 when the contour marker is in position.

To hold the sighting device I in position on the pipe, I provide a pairof hooks 2| which project outwardly from the tube 4, and a chain 22(which may also include a spring section) encircles the pipe and ishooked into the hooks 2 I, thus holding the sighting assembly I inposition, as shown in Figure 1.

A second threaded hole 23 is provided in another face of the protractorI2, as shown, and this threaded hole receives a ring fitting 24 to holdthe sighting tube 25, as shown in Figure 3.

The ring fitting 24 and the tube 25 are positioned, as shown in Figure3, when it is desired to determine the vertical angle of misalignmentbetween the pipes l9 and 20. In this position the protractor I2 isvertical and can be rotated around the pin l3 until the tube 25 bears onthe target 26, which is mounted on the V-blocks 21-28, and positioned onthe pipe section, which is spaced from the sighting assembly i. If thepipes i8 and 29 are merely misaligned in a vertical direction, then thesingle sighting with the protractor 12 in the position shown in Figures2 and 3 will be suiiicient. If the pipes 19 and 29 are misaligned bothvertically and horizontally then with the window !4 turned upwardly, asshown in Figure 6, the protractor I2 is then set in the head 8 so thatthe ring fitting 24 is projecting to the left, as shown in Figure 6. Ariser 29 is now placed in the fitting 24, as shown in' Figure 6, and thesighting tube 25 fits in this riser, the riser being off set so as tomove the tube ,25 substantially to the center line of the tube 4.

By rotating the protractor 52 around its pivot 13 until the sightingtube 25 bears on the target 2.6, it is possible to read the horizontalangle of misalignment.

If desired, a bubble level 39 can be mounted on one of the V-blocks 2 or3 for the purpose of levelling these blocks on the pipe and also abubble 3! may be provided on the protractor 12 for the purpose oflevelling this protractor.

In Figures 7, 8 and 9 I have shown a slightly modified form of V-blockassembly so that the V-blocks can be arranged at an elbow 32 in thepipe. The V-blocks S8--3ii, which are identical to the blocks 2 and 3,are connected by hinged tubes 35-36, that is, these tubes are flat attheir inner ends and are connected by a pin 31, thus hinging the twotubes so that the V-blocks 33 and 34 can be placed at an angle to eachother.

In operation, the sighting assembly 1 is mounted on a pipe by means ofthe chain 22. The target 25 is placed on the adjacent misaligned pipe19. First, the protractor i2 is turned to a vertical position, the ringfitting 24 is screwed into the protractor l2, and the sight tube 25 isplaced in the ring 2d. The set screw I!) can be set so that theprotractor E?! can move only in a vertical plane. By moving theprotractor I2 around its pivot 13, the sight tube 25 can be brought tobear on the target 26. If it is found that it is necessary to alsorotate the trunnion 9, this can be done and the amount of rotation readon the protractor ll.

To determine a horizontal angle of misalignment, as well as thepreviously read vertical angle, the head 8 is turned so that the windowI! faces upwardly. The protractor I2 is removed from the head 8 andturned so that the ring fitting 24 projects to the left, as viewed inFigure 6. A second fitting 29 is now inserted in the ring 24 and thetube 25 is placed in this second fitting, as shown in Figure 6. Theprotractor I 2 is now in horizontal position and can be rotated aroundthe pin l3 until the sight 25 bears on the target 35, at which times thehorizontal angle of misalignment is read.

The same procedure of determining misalignment of parts can also be donewhere these parts are structural shapes instead of pipe. For thispurpose the hooks 5 and 6 are provided which fit over the edge of thestructural shape.

Having described my invention, I claim:

1. A pipe sighting device comprising a pair of spaced V-blocks, a tubeconnecting the V-blocks and fixedly secured thereto, a head, a trunnionprojecting from the head and extending through one of said V-blocks andinto said tube, a protractor pivotally mounted on said head, a ringmounted in the edge of the protractor said protractor having a hole inthe edge thereof to receive the ring, a sighting tube fitted in saidring whereby the sighting tube is mounted in spaced relation to theprotractor.

2. A pipe sighting device comprising a pair of spaced V-bloclzs, a tubeconnecting the V-blocks and fixedly secured thereto, a head, a trunnionprojecting from the head and extending through one of said V-blocks andinto said tube, a protractor pivotally mounted on said head, a ringmounted in the edge of the protractor said protractor having a hole inthe edge thereof to receive the ring, a sighting tube fitted in saidring whereby the sighting tube is mounted in spaced relation to theprotractor, a second protractor fixedly mounted on said head andarranged at right angle to the first named protractor.

JAMES H. MORRIS.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 362,960 Harild May 1'7, 1887 1,922,409 Wyss Aug. 15, 19332,497,933 Devers Feb. 21, 1950 2,569,919 Ridgeway Sept. 25, 1951

